Electric switch.



G. B. THOMAS.

ELECTRIC SWITCH.

APPLICATION FILED AP'R.29. 1913.

1.,2QL112. Patented 0011111916.

llNllTldD SEAE GEQRGE B. THOMAS, 015 BRIDGEPORT, CCNNECTICU'I, ASSIGNOB,TO THE BRYANT ELECTRIC COMPANY, OF BRIDGEPOR'I, CONNECTICUT, ACORPORATION OF CON- NECTICUT.

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Application filed April 29,1913. Serial No. 764,378.

To all whom it may concern:

Be it known that I, Gnoncn B. THOMAS, a citizen of the United States ofAmerica, and residing at Bridgeport, in the county of F airfield andState of Connecticut, have invented a certain new and Improved ElectricSwitch, of which the following is a specification.

The present invention relates to electric switches and particularly toelectric switches adapted to be used in lamp sockets, and the object ofmy invention is to provide an improved switch mechanism and frame inwhich is embodied the invention claimed hy'Gilbert W. Goodridge, in anapplication Serial Number 763,604, dated April 25,

1915, and copending herewith.

In the accompanying drawings, Figure 1 is a side elevation of the switchframe; Fig. 2 is a vertical section through the frame; Fig. 3 is an endview thereof; Fig. 4 is a plan of the blanks from which the frame isformed; Fig. 5 is an end elevation of the switch spindle; and Fig. 6 is.a. perspective of the spindle parts detached.

The switch mechanism which the present frame is designed to support,comprises an oscillating switch piece 10, aswitch actuating spring 11, aplunger 12 on which the spring is mounted, a rocker 13 for moving oneend of the spring past the axis of oscillation of the switch piece ineither direction, and a pair of cams l4 and 15 on the switch spindle 16hearing against the rocker on opposite sides of its axis to actuate therocker.

The present frame comprises a base 17 perforated and screu' -threaded at18 to receive a securing screw. Integral with this base are'end and sideuprights 19, 20 and 21, 22, respectively. The end uprights 19 are gappedat 23 and 24 to form open bearings for the switch spindles, and theupright 19 is spaced from the ends of the side frames 21, 22 to afford aclearance space 25 in which works the cam 14. The side uprights areapertured at 26 to afford a clearance for the cam 15. Perforations 27 inthe side frame permit the passage therethrough of the pivot pin 28 forthe rocker 13. Out-turned lugs 29 on the side uprights form journals forthe switch piece 10 and v these lugs are preferably rounded on theirbearing surfaces to the contour of the bear-- ing apertures 30 in thelegs of the switch spindle, the latter being piece. A pair of offsetlugs 31 form stops against which the spread ends of the switch piecestrike, thus limiting its upward oscil lation, while forwardlyprojecting lugs 32 at the lower portion ofthe side frames rorm stopsagainst which the switch piece strikes on its thus limited downwardtravel.

The switch spindle 16 is of non-circular cross section, and the camsiiand 15, of identical shape, are apertured at to cor-- respond to thecross section ol the spindle, and atan angle of degrees to their respective long axes. This not only enables me to use asingle die forstriking out both cams, but the spindle is automatically relatter atright angles to cam ii and pushed up against the spacing sleeve,wiercupon the spindle is ready for adjustment in the switch frame. Itwill be noted that the axisv of the thumb key 38 corresponds to that ofone of the cams, here cam 15, so

that the key lies in either vertical. or horizontal position in the onor off condition of the switch and so serves as an indicator of theswitch position. The assembly of the parts in the switch frame isequally simple. The switch spindle with its cams in position, is placedin its open gap hearings 23, The switch piece 10 is. then sprung overthe journals on the side frames, whereupon the end oi the plunger 12 onwhich the spring 11 is mounted, is passed through the cross piece at theend of the yoke forming the switch piece and the spring put undertension. The rocker and plunger head being brought into engagement, therocker is properly positioned with relation to the perforations 27 inthe side uprights and the pivot pin 28 passed through the perforationsso that it rests in the bearing groove 39 of the rocker. inasmuch as therocker. is constantly held up are against the pin 28 by the cams 14 and15, the parts are thus simply assembled and efiiciently retained inoperative position.

I claim as my invention 1. In an electric switch, a switch frame havinga base with integral end and side uprights projecting substantially atright angles to the base and to one side thereof, the side uprightsbeing spaced at one end from the adjacent end upright to afford aclearance for an operating cam, and the end uprights having bearings fora switch spindle.

9 In an electric switch, a switch frame having a base with integral endand side uprights projecting substantially at right angles to the baseand to one side thereof, the side uprights being spaced at one end fromthe adjacent end upright and apertured in alinement to afford clearancesfor spaced operating cams, and the end uprights having bearings for aswitch spindle.

3. In an electric switch, a switch frame having a base andat each endthereof an upright apertured to form alined open bearmg gaps, incombination with a switch spindle of non-circular cross section bearingin said journal gaps and having a reduced portion lying in one of saidbearing 'gaps, the latter being of less diameter than the longcross-sectional diameter of the spindle and means for maintaining saidspindle in such angular position when at rest that the portion thereoflying beyond the reduced area of the spindle engages the sides of saidbearing gap and thereby holds the spindle against longitudinaldisplacement.

4. In an electric switch, a switch spindle of non-circular contourhaving its long axis at an angle of substantially 45 to that of theswitch key, and cams on said switch spindle at right angles to eachother, one of said cam-s having its long axis alined with the switchkey.

5. In an electric switch, a switch spindle of non-circular contourhaving its long axis at an angle of substantially 45 to that of theswitch key, and cams on said switch spindle at right angles to eachother, one of said cams having its long axis alined with the switch key,in combination with a switch frame having open gap bearings for saidspindle, .the latter being peripherally recessed at one of saidbearings, for the purpose specified.

6. In an electric switch, a frame having a base with side uprights, apin extending between said uprights, and a rocker arranged below saidpin and freely pivoted thereon, substantially as described.

7. In an electric switch, a frame having a base with side uprights, apin extending between said uprights, and a rocker arranged below saidpin and freely pivoted thereon, said rocker having a transverse bearinggroove in which said pin freely lies in extended position, substantiallyas described.

8. In an electric switch, a frame having a base with side uprights, apin extending between said uprights, and a rocker arranged below saidpin and freely pivoted thereon,

.together with rocking means supporting said rocker from beneath andserving to main-- tain the same in pivoted engagement with said bearingpin, substantially as described.

9. In an electric switch, a switch spindle of non-circular contourhaving its longaxis at an angle of substantially 45 to that of theswitch key, cams perforated to the contour of the switch spindle and atan angle of 45 to the long axes of sail cams, said cams being slippedeve said switch spindle, spaced apart thereon and arranged at rightangles to each other, one with its long axis alined with the switch key,substantially as described.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses.

GEORGE B. THOMAS.

Witnesses:

G. W. Gooonmen, H. M. W ICHERT.

Copies of this patent may be obtained for five cents each, by addressingthe "JLihT-ZiSSiOHCT of Iatent:

Washington, D. 0.

